Dumping-car.



M, H. TREADWELL & O. P. ASTROM.

DUMPING GAR.

APPLICATION FILED MAR. 4, 1908.

Patented N0v.17, 1908.

2 $HEETSSHEET 1.

amvawfom M. H. TREADWELL & C. P. ASTROM.

DUMPING GAR.

APPLICATION FILED MAR. 4, 1908. 903,921 Patented Nov. 17, 1908. 2SHEETSSHEET 2.

u t? 1] "r M M G? W ww fo m 1 a omun 4 UNITED STATES PIETENT MUN SON H.TREADWELL, OF NEW YORK, N. Y., AND CARL P. AS TROM, OF EAST ORANGE, NEWJERSEY, ASSIGNORS TO M. H. TREADWELL COMPANY, A CORPORATION OF NEW YORK.

DUMPING CAR.

Specification of Letters Patent.

Patented Nov. 17', 1908.

To all whom it may concern."

Be it known that we, MUNSON H. TREAD- wELs. and CARL P. Asraon, citizensof the United States, residing at New York, in the county of New Yorkand State of New York, and East Orange, county of Essex, and Stateof'New Jersey, respectively, have invented certain new and usefulImprovements in Dumping-Cars, of which the following is a full, clear,and exact specification.

This invention relates to dumping cars, and has particular reference tocinder cars or the like wherein a tilting and laterally movable car bodyis mounted to be dumped in opposite directions, from a central uprightposition, as may be desired.

More particularly, the invention relates to power actuated dumping carsand has for its objects to provide automatic means for checking themovement of the car body as it approaches the end of its outwardmovement, whereby the use of separate checking devices is avoided.

According to one embodiment of the invention herein illustrated anddescribed, actuatmg. pressure 1s admitted to one s de ,of

-the motor cylinder to set the car body in mo tion, and after it hascompleted a predetermined portion of the stroke the actuating pressureis automatically admitted to the op- .posite side of the motor cylinderand the fur- 'thcr movement of the car body is opposed at this pressure,so that the car body comes to rest-.at. its extreme outward. positiongently without straining the apparatus. By this mechanism, it ispossible to attain a much higher checking pressure (as distinguishedfrom actuating pressure) than has heretofore been the case.

The invention will be more fully under-' stood in connection with thedescription of the accompanying drawings, wherein Figure 1represents anend view ofa dump car embodying the invention, Fig. 2 is a detail viewshowing the piping and valve arrangements whereby the automatic controlis secured, and Figs. 3 and 4 are modifications of checking deviceswhich may be used.

The car frame'comprises the usual under frame carried by end bolsters 1,the under frame not being herein shown. and is supported at the ends ontrucks, which will not be particularly described herein as these may bearranged according to particular necessities. The bolsters 1 each haveastationary rack 2 and a track 3, and the car body 4 is preferablysecured to a bail 5 which is'proend of the car bodyi, and rollers Swhich roll on the tracks, the parts thus far described being of wellknown construction.

In order to actuate the car body, a movable cylinder 9 in combinationwith a fixed piston 10 and piston rod 11 is used, the cylinder having abox at one side to engage the trunnions 6 and a key 12 being provided tohold the trunnion at one or the other side of the cylinder, according tothe side on which the car body is to be dumped. The cylinder slides onupper and lower guides 13, 14 carried by the end bolster 1, and thepiston rod is made hollow from each end to the respective sides of thepiston so as to receive a supply of fluid pressure through the pipes 15,16, which are controlled by a two-way valve 27 to move the cylinder fromone lo the other side. When it is desired to change th-e'side on whichthe car body is to dump,

the key 12 is removed and the cylinder while thus disconnected from thetrunnion is again re-connected at the end of the movement, in the wellknown way In order to automatically check the m0vc ment after apredetermined portion of the stroke, the cylinder l) is provided with aplu rality of ports intermediate its ends, with which are connectedrespectively pipes 17, 18, leading to a valve casing 11) containing amovable valve or plug 20. From one end of the valve casing 15) a pipe 21leads to the right end of the cylinder 9, and a pipe 23 leads from thevalve casing 19 to the left end of the cylinder 9. The pipe 21 containsa check valve 22 opening from the valve casing 19 towards the cylinder9, and the pipe 23 contains a similar check valve also opening towardsthe cylinder.

In the position shown in Fig. 2, the parts are in position to move thecylinder and the car body to the right, the controlling valve 27 beingin such position as to admit pressure through pipe 15 to the right endof the cylinder. hen this is done, the cylinder 9 will move towards theright. the check valve 22 preventing any pressure from passing to thevalve 19. As soon as the piston 10 has passed the port of pipe 17, theincoming pressure from pipe 15 will act to blow the valve plug20 to theleft end of the valve cylinder 19, thereby uncovering the end of pipe 23and connecting it with pipe 17 these pipes being at opposite sides ofthe piston 10. The efl'ect of this is to admit checking pressure on theleft side of piston 10 through pipes 17, 23, and check valve 22, thispressure cushioning the further movement of the cylinder, and after thepiston passes the port, this pressure will be completely trapped, andthe momentum of the car body will be effectually checked by the veryhigh pressure which will thus be produced at the end of the stroke. Ateach end of the cylinder 9 is a pet cock 28, both of which will benormally closed. When the cylinder is to be moved to the right forinstance, the pet cock at the left end may be opened manually for ashort period of time in order to relieve any residual pressure andpermit the car body to acquire momentum, after which it may be closed,and then the momentum of the car body will complete the movement. Also,the

- condensation in the cylinder reduces the pressure on the side of thepiston to which,

the steam was last admitted so that ordinarlly when the cylinder isreversed the power is not materially reduced by not open ing theopposite side of the cylinder to the exhaust. The valve 27 connects thesteam pressure with one or the other of pipes 15 or 16, leaving theother end of the cylinder closed. Without this, as soon as the cylinderuncovers the pipes 17 or 18, the checking pressure would, instead ofbeing confined in the cylinder, rush out through the open exhaust,though the exhaust could be opened for a time if desired. By admittingchecking pressure on the opposite side of the cylinder after the carbody has acquired a sufficient momentum, the further movement will beeifectuallychecked, and at the end of the movement considerably morethan actuating pressure will be present for checking pressure, which isnot the case where the checking movement is dependent upon such amountof air as may be compressed therein from atmospheric pressure, or bysimply admitting the actuating pressure to the other side withouttrapping it. This high checking pressure will only be needed momentarily unless it is used to start the reverse movement, and will berelieved by condensation or by the valves 27 or 28.

In Figs. 3 and 4, a movable piston and fixed cylinder is shown, insteadof the movable cylinder and fixed piston, as in Figs. 1 and 2, but theforms shown in Figs. 3 and 4 are equally applicable to the movablecylinder construction shown in Figs. 1 and 2. In this form, the pressureis admitted to either end of the cylinder by a 4-way controlling valve37, through pipes 30 or 31 iiaving check valves 32 opening towards thecylinder, to start the movement, and after apre determined movement thepiston 10 uncovers a pipe 33 or 34 and admits pressure independently ofthe pipe 30 or 31 containing a check'valve 32. At the same time, thepipe 34 is open to the exhaust so that the movement is unrestricteduntil near the other end, when pipe 34 will be covered by the piston,and the remainder of the movement will be against the fluid pressureaccumulated at the ends of the cylinder, it being unable to escape atthe end by reason of the'check valve 32. Vhen it is desired to'start inthe opposite direction, the check valve opens to admit the pressureuntil the pipe 34 is uncovered. Thus the movement will be automaticallycushioned at the ends and for a proportion of the stroke dependent uponthe positions of the pipes 33 and 34. It willbe seen that in all casesone or the other ofthe check valves will open to permit the movement inthe reverse direction, and the pressure can be relieved by pet cocks 28,as before.

In Fig. 4, a single pipe 3.6 at the middle of the cylinder permitsexhaust until the piston 10 has passed it, the remainder of the strokebeing checked by the accumulation of air or steam between the piston 10and the end of the cylinder, it being unable to escape through thecheckvalve 32, but one or the otherof these valves will open to admitactuating pressure when the movement is to be reversed. It will beunderstood that the forms shown in Figs. 3 and 4, while showingmovablepistons and fixed cylinders are equally applicable to themovable-cylinder and fixed piston construction shown in Figs.

l and 2, it not being considered necessary to further increase theillustration by showing such applications, as they are obvious to askilled mechanic.- Y

From the foregoing, it will be seen that means is herein providedwhereby the checking pressure can be made to considerably exceed theactuating pressure, which is an ini portant advantage, and so far as weare aware, not heretofore known. Furthermore, so far as we are aware, ithas not heretofore been proposed to automatically admit this checkingpressure at a predetermined portion of the stroke by means of a valvecontrolled according to the relative position of the cylinder andpiston.

Modifications and changes in the specific apparatus herein described maybe made: without departing from the scope of the invention.

Having thus described our invention, we declare that what we claim asnew and de sire to secure by Letters Patent, is': f 1. The combinationwith a pressure operated dumping car body, of means for checking themovement of the car body by automatically admitting actuatingv pressureto the motor to oppose the movement.

2. The combination with a motor oper-' secure a maximum checkingpressure at the end of the movement.

3. The combination with a motor operated dumping car, and a pressureactuated reciprocatory motor, of means for admitting pressure on oneside to start the motor, 'means for trapping pressure o'n the other sideat, a predetermined portion of the stroke to check the movement at the.end, 'and ;means..w hereby actuating pressure can be admitted to reversethe motor.

4. The combination with a motor operated dumping car, and a pressureactuated reciprocatory motor, of means for admitting pressure on oneside to start the motor,-

means for trapping pressure on the other side at a predetermined portionof the stroke to check the movement at the end, means whereby actuatingpressure can be admitted toreverse the motor, and means for relievingthe checking pressure.

5. The combination with a motor 0 erated dumping car, and reciprocatoryactuating means, of controlling means for actuating the motor, means.for automatically admit ting actuating pressure at a predetermined pointof the stroke to check the movement, and means for automatically cuttingoff such pressure at a second of the stroke.

6. The combination with a motor operated dumping car, and'reciprocatoryactuating means, of controlling'means for actuating the motor, meansforaiitomatically admitting actuating pressure at a predetermined pointof thestroke to check the movement, and means for automatically cuttingofl such pressure at a second predetermined portion of the stroke andbefore the end of ,the stroke. 7

7. The combination with a "tilting. and bodily movable car body, of anactuating piston and cylinder, means for admitting pressure on one sideof, the piston to move the car body, means for admitting pressure on theother side of the piston at a predetermined portion of the stroke, andmeans for automatically cutting oflf the latter pressure upon a furtherpredetermined movement.

predetermined portion predetermined movement.

9. j The combination with a tilting and bodlly movable car body, and anactuating cylinder and piston therefor, of means for admitting pressureat either end to actuate the car body, and. means controlled by theposition of the piston relatively to the cylinder for admitting checkingpressure to the exhaust side of the cylinder.

' 10. The combination with a tilting and bodily movable car body, and anactuating cylinder and piston therefor, of means for admitting pressureat either end to actuate the car body, means controlled by the positionof the piston relatively to the cylinder for admitting checking pressureto the exhaust side of the cylinder, and means also controlled therebyfor cutting off the actuating pressure from the exhaust side of thecylinder upon a further movement.

11. The combination with a tilting and bodily movable car body, and anactuating cylinder and piston therefor, of means for admittingpressureat either end to actuate the car body, a normally closed passageconnecting separated portions of said cylinder around the piston, and avalve controlled by said piston for opening said passage at apredetermined point of the stroke.

12. The combination with a tilting and bodily movable car body, and anactuating cylinder and piston therefor, of means for admitting pressureat either end to actuate the car body, a normally closed passageconnecting separated portions of said cylinder 'around the piston, and avalve controlled by sai piston for opening said passage at a preetermined point of the stroke, and =niea-ns controlled by said pistonfor closing said passage after a predetermined move- ..ment of themotor. V

-In testimony whereof we afliX our signatures, in presence of twpgvitnesses.

MUNSON H:- TREADWELL. CARL P. ASTROM. Vitnesses: v

SAMUEL KETOHUM,

GEO. O. HOFFMAN.

